Question 2(b) a) A flywheel with a diameter of 356 mm accelerates uniformly from rest at arate of 2.5 rad/s?² for a period of 1.8 minute. It then continues at the maximumspeed attained for a further period of 4.5 minutes, after which it deceleratesuniformly to rest over a final period of 2.8 minutes.Calculate for the flywheel:(a)The maximum angular velocity attained in rad/s and also in rev/min.(b)The rate of deceleration during the final period of the motion.(c)The angle, given in radians, turned through by the flywheel duringits period of acceleration.marks)b) A tensile test was carried out on a mild steel test-piece having a diameter of12mm and a gauge length of 88mm. During the test, it was found that at thelimit of proportionality the load on the test-piece was 41.5kN and the extensionof the 88mm gauge length was 0.11mm. It was also found that the maximum loadon the specimen during the test was 98KN.Calculate for the steel:a) Its stress at the limit of proportionality.b) Its strain at the limit of proportionality.c) Its Modulus of Elasticity.d) Its Ultimate Tensile Stress.

2b) Given: Gauge Length (L)=88mmDiameter of the bar (D)=12mmLoad at limit of proportionality…

b) A tensile test was carried out on a mild steel test-piece having a diameter of 12mm and a gauge length of 88mm. During the test, it was found that at the limit of proportionality the load on the test-piece was 41.5kN and the extension of the 88mm gauge length was 0.11mm. It was also found that the maximum load on the specimen during the test was 98KN. Calculate for the steel: a) Its stress at the limit of proportionality. b) Its strain at the limit of proportionality. c) Its Modulus of Elasticity. d) Its Ultimate Tensile Stress.

b) A tensile test was carried out on a mild steel test-piece having a diameter of 12mm and a gauge length of 88mm. During the test, it was found that at the limit of proportionality the load on the test-piece was 41.5kN and the extension of the 88mm gauge length was 0.11mm. It was also found that the maximum load on the specimen during the test was 98KN. Calculate for the steel: a) Its stress at the limit of proportionality. b) Its strain at the limit of proportionality. c) Its Modulus of Elasticity. d) Its Ultimate Tensile Stress.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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